Pump



UNITED STATES PATENT OFFICE.

CHARLES R. EDWARDS, OF PEKIN, ILLINOIS.

"PUMP,

Application filed November 23, 1917.

To all who/n t may concern Be it known that T, CHARLES B. EDWARDS,

a citizen ot the United States, residing at Pekin, in county of Tazewell and State of Illinois, have invented certain new and uselul Improvements in Pumps, of which the following is a specification.

My invention relates to an improvement .in double-acting pumps and the present invention is an improvement on the disclosure or Letters Patent No. 1,084,413, granted to me January 13, 1914.

One ol' the objects of this present invention is to make provision for having all valves within the bore of the main cylinder, thus, making the cylinder more compact so that it is adapted to fit smaller well casings.

ln the drawings:

Figure 1 is a vertical sectional view.

Fig. 2 is a transverse section.

Fig. 3 is a transverse section through the plunger rod guides.

Fig. 4 is a bottom plan view ot' the plunger rod guide.

Fig. 5 is a top view ot the three-way valve, and,

Fig. 6 is a bottom plan view of the same.

A represents an outer cylindrical shell of my improved double-acting pump, the same having internal screw threads at each end as shown in Fig. 1, and provided with channels K and L, for the passage of water which extends nearly throughout the length of the cylinder.

A brass lining B, of cylindrical form is located concentrically within the cylinder A, where it is held centered by the enlargements 1, and reinforcements on the inner wall of the cylinder asv shown in Fig. 2, thereby dividing and separating the channels K and L.

Openings 2, 3, 4 and 5, are made through the lining B, as a means of communicating with the channels K and L, at the upper and lower ends thereof.

Fitted within the lining B, is the plunger which consists in a disk D, screwed to the threaded end of the plunger rod G, with the two leather washers P, the nuts H, and washers U, which hold the parts together and cause the plunger to lit the bore of the lining, water-tight.

At the upper end of the cylindrical shell the plunger rod guide E, is located and within this guide there is a compartment or Specification of Letters Patent.

Patented Apr. 13, 1920.

sel-iai No. 203,532.

liquid passage 7, which opens downwardly into the cylinder and registers laterally with the opening 2, leading into the upper end of channel K. This plunger rod guide E, also has two liquid passages S, as shown in Figs. 3 and 4, for liquid leaving the cylinder and a valve F, on the upper side of the plunger rod guide closes or controls the outlet and prevents a back ilow of water through these passages 8.

A three-way valve arrangement C, is located at the lower end of the cylinder A, and tted in the lower end of the lining B, and with a flange which preferably eX- tends around the extreme lower end of the lining B, the arrangement is held in position in lining B, by the cylinder cap R, which is screwed into the lower end of the cylinder as shown in Fig. 1. The opening T, through this cylinder cap B, is also screw-threaded for attachment to the pipe fitting (notshown).

'Referring back to the three-way valve arrangement C, it is divided into three compartments by meansot the diagonal partitions lV and Z, it being open at the bottom to communicate with the opening T, through the cylinder cap R, and having openings at its upper end which are controlled by valves N and O, which open by the water pressure in opposite direction, and a valve M, at the lower end of the three-way valve arrangement opens inwardly and controls the passage of water through the opening 4, into the lower end of channel K, whereas the valve O, controls the passage of water through the opening 5, and at the lower end of channel L, and the valve N, passes the water up into the cylinder above the threeway valve arrangement.

From the foregoing, it will be seen that all valves, channels, passageways and the like, are within the cylindrical circumferential area of outside cylindrical shell A, which makes a compact arrangement of parts and adapts my present pump to fit small-sized well casings.

The operation is as follows On the up stroke of the plunger, liquid is drawn up into the lower end of the cylinder through valve N, thus filling the cylinder below the plunger with the completion of the up stroke of the plunger. When the plunger starts its downward stroke valve N, is closed and at the same time, valve O, is forced open and, the liquid in the cylinder is forced out through opening 5, into the lower end of channel L, thence up through the latter and out through the outlet V, at the top into the pipe fitting above (not shown).

At the same time the plunger is lowering and forcing' liquid through the channel L, it is also taking liquid into the upper end of the cylinder through opening 2, from channel l, so that when the plunger is down the upper part of the cylinder above the plunger is filled with liquid.

is the plunger starts on its up stroke, the valve M in the lower end of the three-way valve arrangement C, leading to opening fl, at the lower end of channel K, is closed, and the valve l?, over the plunger rod guide E, is open at the same time and the liquid above the plunger is forced upward through passages 8, out of the cylinder at the outlet V, sor that the liquid is forced out by both the down stroke and the up stroke, thus creating a continuous iiow while the pump is in operation.

In other words, while the plunger is lowering it is forcing liquid above cylinder from the bottom and illing at the top, and when the plunger is being raised it is raising the liquid above the plunger from the cylinder and at the same time filling at the bottom.

l. A double-acting pump comprising an outer cylindrical shell, a cylindrical lining, means spacing the two apart and dividing the space therebetween into separate channels, the lining having openings at each end -into the channels, a three-way valve consisting of a flanged tube inserted into said cylindrical lining and divided into three compartments, two of which communicate with two of the openings in the cylindrical shell, the other compartment forming an opening longitudinally of the cylindrical shell, valves for said compartments, a plunger rod guide having passages to the space both above and below it and also a lateral passage in communication with an opening into one of the channels, a valve for controlling' the passage therebeneath, a plunger rod passing through said last-mentioned valve and plunger rod guide, and a plunger on said rod.

2. A double-acting pump comprising an outer cylindrical shell, ribs extending longitudinally of its bore, a cylindrical lining iitted to the inner walls of said ribs whereby the shell and lining are spaced apart and separate channels are formed therebetween, the lining having an opening at the upper and lower ends into each channel, plunger rod guide at the upper end of the lining which has passages therethrough to the space both thereabove and below and another lateral passage in communication with one of the channels, a valve above said plunger rod guide for controlling the upward passage, a plunger rod slidable through sait slide valve and plunger-rod guide, a threeway valve consisting of a flanged tube inserted into said cylindrical lining and divided into three compartments, two of which communicate with two of the openings in the cylindrical shell, the other compartment forming an opening lengthwise of the cylindrical shell, valves for said compartments, and a cap having screw-threaded connection with the outer cylinder and adapted to bear against the flanged end of the tubular member for retaining the latter in position.

In testimony whereof I aflix my signature.

CHARLES R. EDWARDS. 

